load balancing two web servers each on two different isp's?

Posted by Scott on Server Fault See other posts from Server Fault or by Scott
Published on 2010-04-20T11:14:59Z Indexed on 2010/04/20 14:34 UTC
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Filed under:

load-balance

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mysql

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php

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dns

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drupal

I have two ISP's that provide me hosting via apache / php / mysql. I am running drupal on them. On occasion the mysql server will go away (crash), so I was hoping to find a reasonable way to have a fail over, if server A SQL is down, all traffic is sent to server B.

I know traditionally this is handled in DNS where a second alternate ip is given if there is a problem - or similar. But I do not have control over the isp, other than I can run php, perl and the usual apache stuff. Also, I have static ip's on each isp, and I can create dns entries (A/CNAME/TXT).

So, I was hoping there might be a way for me to have a script that checks if drupal has a problem, and if so, somehow alter dns, or ?

Or, any other ideas? (other than spending lots more $ on a better isp)

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